Function import_config 

pub fn import_config(
    path: &str,
    out: &str,
    format: Option<&str>,
    p: &mut dyn Progress,
) -> Result<()>

rxp config import: the spec that regenerates path, written to out.

The spec is named after the file. format names a codec; without it the codec is the one whose signature the file starts with. Chip libraries are chosen by chip id from the embedded set, as the site does. Every field the file did not determine is warned by name.